You could test the completed great-books-app
(there is a big blue button Try in AppBuilder
) to verify how it is supposed to work. As to your local copy, would you please ensure that you have applied all the steps as they are listed in the guidance?
Let me know if you managed to proceed with this or should I assist you further.
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Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items